Heat-transferring device.



1. 11. LOVEKIN.

HEAT TRANSFERRJ'NG DEVICE.

APPLICATION FILED SEPT-23. 1911.

Patented May18,1915,

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WITNESSES I m1 k),

6M & ATTORNEY L. D. LOVEKlN.

HEAT TRANSFERR ING DEVICE. APPLICATION FILED SEPT-23.1911.

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HEAT-TRANSFERRING DEVICE.

Specification of Letters Patent.

Patented May 1%, H915.

Application filed September 23, 1911. Serial No. 650,879.

To all 1071 omit may concern:

Be it known that T, LUTHER D. 'LOVEKIN, a citizen of the United Statesof America, residing in the city and county of Philadelphia and in theState of Pennsylvania, have invented a certain new and usefulImprovement in Heat-Transferring Devices, of which the following is atrue and exact description,

compactness, efficiency in operation, the lowcost at which it can bemanufactured, and the ease with which it may be cleaned and repairedwhen necessary.

The various features of novelty which characterize my invention arepointed out with particularity in the claims annexed to and forming apart of this specification. For a better understanding of the invention,however, and the advantages possessed by it reference should be had tothe accompanying drawings and descriptive matter in which I haveillustrated and described forms in which the inventionmay be embodied.

Of the drawings, Figure 1 is a sectional elevation of an evaporatorsuitable for use in forming pure water out of salt water by distillationand condensation, the section being taken on the line 11 of Fig. 2. Fig.2 is a sectional elevation taken on the line 2-2 of Fig. 3. Fig. 3 is asectional plan taken on the line 3-3 of Fig. 1. Fig. 4 is a view takensimilarly to Fig. 3, showing a modification, and Fig. 5 is a view alsotaken similarly to Fig. 3 and showing still another modification.

In the drawings and referring first to the construction shown in Figs.1, 2 and 3, A, represents the casing body for the salt water containingchamber A". This body is formed with a closed bottom A, and with anopening at one side, and with a seat A which surrounds this opening andagainst which a member B may be removably secured. The memberv Ais openat its upper end 'and is formed with a seat A against which the lowerend of the wall of the vapor chamber C of the evaporator is bolted. Themember C is provided with an outlet C at its upper end, adapted to beconnected by suitable piping to a condenser or other w chamber intowhich the vapor is to be discharged. The water to be evaporated entersthe. chamber A through the lateral port A and at its lower end themember A is provided-with sludge draw ofi' openings A.

Toi' dry the vapor passing from the water chamber to the steam chamberof the evaporator 'a plate or diaphragm D having ports D formed in itscentral portion is extended across the top of the member A.- The portedportion of the plateD is surrounded on the upper side of the plate by atubular body D which loosely telescopes with a tubular body'E secured tothe adjacent side of a disk E which is arranged within but is slightlyless in diameter than the vapor chamber C and is supported from thelatter by brackets E. the plate D on the outer side of the tubular body.D may flow back to the bottom of the chamber A through drain tubes F. I

Gr, represents a heat insulating casing surrounding the casing members Aand C proper, and the space G between the casing G and members A and Cmay be filled by suitable heat insulating material.

The member B which is removably secured against the side opening in themember A is formed with a plurality of vertical chambers, of which thereare five: B, B B B and B in the construction shown in Figs. 1, 2 and 3.Of these chambers B and B serve as terminal chambers for the heating.fluid. The chamber A B communicates through a port B with a steam inletpassage A formed in the casing member A, and the chamber B communicatesthrough a port B at its lower end with a drain passage A also formed inthemember A. The various chambers in the member Bare connected forseries flow through the chambers by a plurality of bowed tubes which areconnected at their ends to the member B and have their bodies extendinginto the chamber A. As

shown these tubes are arranged in parallel Liquid collecting above Igroup or layer, as shown in Figs. 1, 2 and 3 comprises four tubes H ,H",H and II,

- which vary progressively in length and are I so Y i ulation of themember B in assembling the nested together. Each set of tubes are shownas lying in the same plane, which should be practically horizontal,though the tubes may advantageously .be, inclined slightly so thatcondensed liquid will readily drain out of the'tubes. Each group orlayer of tubes serves to connect the various cham= bers in the member Bfor series flow therethrough, the opposite ends of each tube opening toseparate chambers, and each of the chambers except the terminal chambersB and B having connected to it one end of each of two tubes. As clearlyshown in Fig.

3, the flow from the inlet chamber B is through the tube H to thechamber B" and from thence through tube H to chamber B from thencethrough tube H to the chamber B, and from the latter through the tube IIto the outlet chamber B 'Advantageously the adjacent layers of tubes areseparated bya distance slightly exceeding the tube diameter sothat-incase ofinjury to an inner tube the'latter after being out free from thehead B may be first dropped into the space immediately above the nextlower set of tubes and then be readily removed anda new tubecorrespondingly put in place in a similar manner. The

ends of the tubes may be secured in the member B in any usual orsuitable way, as

by expanding them in the manner shown.

closed by plugs I. To facilitate the bodily removal of the member B andof the attached tubes I prefer to make the support for the lower set oftubes a roller I This .roller serves as a guide and support for thetubes. in the "withdrawing operation.

"B represents ears formed on the upper end of the member B to facilitatethe manipapparatus, and taking, the apparatus apart. It will beunderstood that the number of tubes nesting together in each group orlayer may be varied to suit conditions and in Figs. 4 and 5 I have shownarrangements differing from each other, and from the construction shownin Fig. 3 inthe number of tubes employed in each group or layer. Whereeach pair of chambers in the tube supporting member are connected by butone tube in each group or layer, the number of chambers in the tubesupporting member must be one greater than the number of tubes in eachgroup. This numerical relation of tubes and tion.

chambers is not essential, however, as is shown in Fig. 4.- forinstance, where six tubes- H, H H H, H and H in each nested group areemployed to, connect in series the two terminal chambers B and B and theone intermediate chamber B formed in the tube supporting member B B. Inthis arrangement theflow between each directly connected pair ofchambers is through three of the six tubes employed in each set. It willbe obvious without further explanation that many difier'entarrangementsof tubes and chambers'may be employed as condi tions maymake desirable.

While in general I prefer to employ tubes of .simple U-shape it isapparent that other forms of bowed tubes may be employed, and in Fig. 5I have illustrated an arrangement in which a portion of each tube I-I- His in the form of a circular arc of substantially more than 180. Thisarrangement of tubes permits of the use of a casing body A A more nearlyapproaching a cylinder than does the member A- of the constructionsshownin Figs. 1, 2 and 3, and 4. The tube supporting member B C isessentially the 4 same as the member B first described.

The ease with which the construction described can be assembled andrepaired, and the comparatively low cost at which it can bemanufactured, will be apparentto those skilled in the art withoutfurther explana- It will also .be apparent to those skilled in the artthat the tube arrangement, characteristic of the invention, tends tohigh efliciency and; minimum bulk of apparatus for the serviceperformed. The volume of water'in the boiling chamber is desirablysmall; the tubes areuniformly spaced and are close togetl1er,'thusinsuring a rapid and effective circulation of' the liquid being boiled.The shape of the tubes' insures freecontraction. Since the drain andsteam supply pipe connections are made to the casin member A, these pipeconnections need no be interfered with when the member B is dom fromtroubles due to expansion and removed. ,The series flow of the heatingfluid through the various chambers of the tube supporting member and aplurality of tubes is an important feature, as I have found, since inorder to effectively and rapidly abstract the heat from steam flowingthrough a pipe it is essential'that the pipe should have a considerablelength and in general I may say that in apparatus of the type disclosedthe length of pipe, (tubes connected in series) in each steampathbetween the inlet and outlet chambers should be equal in feet to notless than about thirteen or fourteen times the cross-sectional area ofthe tube passage in inches.

. known to me, it will be apparent to those skilled in the art, thatchanges may be made in the form 0I the apparatus disclosed withoutdeparting from the spirit of my invention, and that in some casescertain features in length and nested together and a chambered memberinto which the tube ends are connected so that adjacentpairs of tubegroups are-separated by a distance slightly exceeding the diameter of anindividual tube.

2. In a device of the kind described, a

casing wall formed with a lateral aperture,-

a chambered member adapted to be secured to said wall to close saidaperture and a plurality of paralleltube groups each consisting of twoor more bowed tubes differing in length and nested together and havingtheir ends secured into said member and tube supports connected at theirends into said casing wall and extending between each adjacent pair oftube groups.

3. In a device of the kind described, the combination With a casing wallformed with a lateral aperture, of a member adapted to be detachablysecured to said casing wall to. r

. its periphery, and telescopic tubular baflles close said aperture, anda plurality of parallel tube groups arranged at successively higherlevels and each consisting of two or more bowed tubes which differ inlength from each other and are nested together and have their endssecured to said chambered member, and a roller support for one of saidtube groups secured to said casing wall and adapted to forma support forthe corresponding tube group as said member and attached tubes are beingmoved into and out of the position in which the said aperture.

at. In a device of the kind described, the combination with a casingwall formed with a lateral aperture, a member adapted to be membercloses detachably connected to said Wall to close said aperture, saidmember being formed with a plurality of chambers, and a plurality ofbowed-tubes having their ends connected to said member and connectingthe chambers thereof, said member being ,formed with an inlet portopening into one of said chambers and an outlet port opening fromanother of said chambers, and said casing wall being formed with portsadapted to register with said inlet and outlet ports when said member issecured in place to close said aperture.

5. In a device of the kind described, the

combination of a chambered casing formed with a lateral aperture in thelower-portion of its wall, a chambered member detachably attached tosaid casing to close said aperture, bowed tubes each connected at itsopposite ends to said. chambered member and extending into the lowerportion of said casing when said member is in its aperture closingposition, means dividing said casing into a'lower boiling compartmentcontaining said tubes and an upper vapor compartment, said meanscomprising a lower centrally apertured diaphragm extending across saidcasing and an upper diaphragm also extending across said casing butarranged to provide vapor passages adjacent

